Goat4

Ultralight Glider, Descriptive Drawings

By Mike Sandlin San Diego, California, US of A April 18, 2009

This file contains 82 drawings which describe the Goat4, an experimental ultralight glider which I have designed, built, and flown.

The Pig plans (a different download from the same website) are worth looking at for Goat4 possible upgrades, since the construction is similar and it is a later design. In

particular, the newer quickpins and control line standards may be of interest. Other possible upgrades might be suggested by the Pig's boat seat, simplified nose structure, and

prismatic rudder pedals.

These technical drawings are intended to be a description of what I have done, not a set of plans, at least not in the sense of providing instructions or advice to any second

party. For liability reasons, I give no technical advice, nor do I recommend building or flying any specific aircraft, nor do I represent myself as any kind of expert.

These drawings is provided in ".DFX" format, an Autocad file format, which can be viewed, printed, and edited with Computer Assisted Design (CAD) software. The .dxf files are

primarily provided for CAD users who wish to closely examine and/or modify the design.

The drawings are organized as follows:

Assembled Aircraft and Standards Drawings

A1. Assembled Aircraft

A2. Aircraft Overview

A3. Nominal Dimensions

A4. Quick Pin Shafts & Handles

A5. Quick Pin Retainers

A6. Metal Fabrication & Fasteners

A7. Composite Rib Structure

A8. Standards for Steel Cables

A9. Standards for Control Lines

A10. Fabric Covering Standards

A11. Tensioning Cable Connector

A12. Assembly Sequence

A13. Cable Connectors

A14. Transport Items

A15. Reference Overview

Tail Drawings

T1. Rudder

T2. Rudder Horn

T3. Horizontal Stabilizer

T4. Horizontal Stabilizer Detail

T5. Elevator

T6. Elevator Detail

T7. Horizontal Tail Assembly

T8. Tail Assembly Detail

T9. Vertical Stabilizer

T10. Vertical Stabilizer Detail 1

T11. Vertical Stabilizer Detail 2

T12. Vertical Stabilizer Detail 3

T13. Vertical Stabilizer Detail 4

T14. Vertical Stabilizer Lower Tube Detail

T15. Vertical Stabilizer Internal Struts

T16. Elevator Slide Tube

T17. Fabric Covered Tail Section

T18. Swivel Snaphook Connections

T19. Tail Struts

T20. Horizontal Stabilizer Attachment

Wing Drawings

W1. Wing Tubing

W2. Main Wing Assembly

W3. Wing Outboard Frame Assembly

W4. Wing Midframe Assembly

W5. Wing Inboard Frame Assembly

W6. Midframe Strut Assembly

W7. Right Wing Joining Assembly

W8. Cabane Assembly

W9. Cabane Detail 1

W10. Cabane Detail 2

W11. King Post Assembly

W12. King Post Detail

W13. Landing Cable Tensioning

Secondary Structure Drawings

S1. Wing Secondary Structure Overview

S2. Flap Panel

S3. Aileron Panel

S4. Aileron Folding Control Arms

S5. Aileron Push Rod

S6. Wing Outboard End Structure

S7. Wing Inboard End Structure

S8. Wing Ribs

S9. Leading Edge Shell

S10. Aft Sweep Cable Connection

S11. Aileron Control Line Routing 1

S12. Aileron Control Line Routing 2

S13. Aileron Control Line Crossover Connection

S14. Wing Fabric Covering

Nose Section Drawings

N1. Nose Section Top Frame

N2. Nose Section Detail

N3. Forward Nose Structure

N4. Wheel Mount

N5. Rear Nose Upper Frame

N6. Seat Back Frame

N7. Control Stick Assembly

N8. Torque Tube Assembly

N9. Rudder Pedals

N10. Stick & Rudder Pedal Installation

N11. Forward Nose Control Lines

N12. Rear Nose Control Lines

N13. Nose Section Detail 1

N14. Seats & Pads

N15. Tow Release

N16. Seat Belts

N17. Nose Section Detail 2

N18. Rudder & Elevator Control Lines

N19. Emergency Parachute 1

N20. Emergency Parachute 2

Additions and revisions to the Goat4 drawings will be posted on my "Basic Ultralight Glider" Website. A drawing that is revised will have a later date than previous versions.

(These updated drawings will be included in susequent (higher numbered) Zip files). Check the website for a revision of any downloaded drawing before accepting it as the

current version.